Elastic single tether has a 6' leg that extends from 41" to 72".This tether meets all World Sailing Offshore Special Regulations (OSR) Section 5.02 requirements for strength, design and features for sailboat racing.It incorporates a lightweight aluminum double-action safety hook, built-in stress indicator and welded O-ring for improved security offshore, whether racing or cruising.Key FeaturesIncludes a bright overload indicator flag embedded in the stitching that is exposed when the tether is stressed to the point of needing replacement (about 900lb. of force triggers the flag).The boat-end aluminum safety hook has an easy-to-use double-action gate that automatically locks closed, so it wont accidentally release from attachment pointsDouble-action gate is extremely easy to open in one ergonomic movement without pinching your handsInternal elastic located inside the webbing cover retracts when not under load, staying out of the wayNon-magnetic, stainless steel snap shackle at chest closes securely and easily releases from the harness when it is under load